BRUSSELS, April 12 (Xinhua) -- A new documentary about Przewalski's horses, last endangered species of wild horses, and their lengthy journey from Belgium to their original habitat at China's Xinjiang Wild Horse Breeding and Research Center, was premiered at the China Cultural Center in Brussels on Thursday.

The 33-minute documentary, named "Jardin Extraordinaire: Przewalski's horses", was filmed in Belgium, the Czech Republic and China.

The film will be officially broadcast on Belgium's largest television station RTBF on April 22.

Attending the event, Chinese Ambassador to Belgium Qu Xing said in his speech that the Przewalski's horses to be sent to China will act as symbolic "ambassador" of Belgium in China, similar to the importance attached to the two pandas that arrived in Belgium in 2014.

Tanguy Dumortier, presenter of the documentary, spoke at length about the importance of nature conservation in his opening speech.

"We want to convey such key messages through this documentary film produced in cooperation with China: protecting the natural environment is protecting the future of mankind. It can cross language and cross national borders. It is a cornerstone for amicable relations and friendship."

The Przewalski's horses are the only surviving wild horses on earth and were first spotted in the 1880s in the Junggar Basin in Xinjiang at the junction of Gansu and Inner Mongolia. However, due to western expeditions in the 20th century, the horses became largely extinct in China by the 1960s.

An international breeding program that began in the Caves of Han in Belgium now made it possible for these horses to once again trot across the vast steppes of Xinjiang. Moving forward, the aim for those involved with the program is to eventually reintroduce the horses back into the wild.